Eight-day alarm-clock



(No Model.) 2 Sheets-Sheet 1.

W. DUPEN.

EIGHT DAY ALARM CLOCK.

No. 596,146. Patented Dec. 28, 1897.

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attozwu x (No Model.) 2 Sheets-Sheet 2, W. DUPEN.

EIGHT DAY ALARM CLOCK.

1897. TTTE- Patented Dec 28 TEE-:11 Eh UNITED STATES PATENT @FFIQE \VILLIAM DUPEN, OF XVIIATCOM, lVASHING'lON.

EIGHT-DAY ALARM-GLOCE Q SPECIFICATION forming part of Letters Patent No. 596,146, dated December 28, 1897.

Application filed May 28, 1897- .[b all whom it may OOH/067":

Be it known that 1, WILLIAM DUPEN, a citizen of the United States, residing at lVhatcom, in the county of lVhatcom and State of WVashington, have invented certain new and useful Improvements in Alarms for Eight- Day Clocks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in an automatic alarm for eight-day clocks, and the object is to provide a simple, effect ive, and reliable alarm for this purpose.

To these ends the novelty consists in the construction, combination, and arrangement of the same, as will be hereinafter more fully described, and particularly pointed out in the claims.

In the accompanying drawings the same reference-characters indicate the same parts of the invention.

Figure 1 is a front elevation of an eight day-clock alarm embodying my invention. Fig. 2 is a similar view with the hands and alarm-dial removed from the clock-move ment and the front plate removed from the alarm-movement. Fig. 3 is a vertical section. Fig.4 is a longitudinal section on the line 4 4 of Fig. 3.

1 represents the minute-hand post of an ordinary eight-day-clock movement, and 2 is the hour-sleeve, which is so geared as to make one revolution to every twelve of the minute-hand shaft.

3 represents a pinion fixed on the alarmalso fixed on said sleeve 5 to rotate uniformly with the gear wheel 4. An approximately horizontal lever 8 is fulcrumed on a rivet 0, fixed in the clock-frame, and its free end is Serial No. 638,627. (No model.)

turned horizontally at a right angle to extend across the path of the cam 7. A vertical rod 10 is pivoted at its upper end to said lever and its lower end to the longer arm of the bell-crank lever 11, fulcrumed on a stud 12, fixed in the frame 13 of the alarm-movement 14. This alarmmovement comprises the usual spring-actuated shaft 15, provided with a radial-armed gear 16, which meshes with a pinion 17 on a shaft 18, carrying a gear-wheel 19, which in turn meshes with a pinion 20, fixed on a second counter-shaft 21, whichalso carries an escape-wheel 22.

23 represents the usual verge hammer-arm fixed on an oscillating shaft 24, and from which a spring-arm 25 extends, its outer end being provided with a hammer 26, which is adapted to sound an alarm on the gong 28.

29 represents a shaft journaled in the alarmmovement frame, and is provided with a de pending arm 30, which projects into the path of the upper end of the escape-lever 23. A second arm extends vertically upwardly from said shaft and crosses the path of a stud 31, projecting laterally from the shorter arm 23 of the bell-crank lever 11. I

A disk 32 is loosely mounted on the main shaft of the alarm-movement, and it is provided with a lateral stud 33, which projects between the contiguous arms of the gearwheel 16, so as to permit a limited play of the said disk 011 its shaft. A leaf-spring 31 is fixed at its outer end to the periphery of said gear-wheel, and its free end is in operative contact with the stud 33 to press it'for Ward against that one of the radial arms of the gear-wheel adjacent the free end of the spring.

35 and 36 represent integral projecting teeth oppositely arranged on the periphery of the disk and adapted and arranged to travel across the path of the stud 31 on the shorter arm 23 of the bell-crank lever 11. A leafspring 37, fixed to the escape movement frame, has its free end resting against the lower end of the shorter arm of the bell-crank lever to normally press it into the path of the projecting teeth 35 36 on the disk.

To set the alarm, the dial 6 is rotated to the right until the desired hour on the dial is in line with the hour-hand. 'When the hourhand sleeve and its pinion 3 are rotated, the

gear-wheel 4 is also rotated to carry the toe 38 of the trip-cam 7 from under the arm of the lever 8, and at this point the rod 10 falls and releases the bell-crank lever, so that its leaf spring 37 presses the shorter arm, carrying the stud out of the path of the vertical arm on the oscillating shaft 24, thus freeing the verge hammer-arm and allowing the alarm to be sounded. The main driving shaft of the alarm-movement then rotates to the right, carrying with it the disk 32, one of the teeth of which comes in contact with the stud on the shorter arm of the bell-crank lever and remains stationary there until the other radial arm on the main driving-gear reaches the lateral stud on the disk to carry it still farther forward, so that the tooth on the disk presses against the stud on the bell-crank lever, forcing it outwardly against the vertical arm of the oscillating shaft, which in turn carries its depending arm into the path of the upper end of the verge hammer-arm to stop its movement, and consequently check the alarm. When the sleeve 2 on the clock-movement has rotated the gear-wheel 4 a sufficient distance to cause the cam-disk to reach the trip-lever, its rod 10 also reaches the longer arm of the bell-crank lever and withdraws the stud on its shorter arm from the path of the tooth on the disk 32, which allows its leafspring 3s to carry the disk forward until its lateral stud comes in contact with the forward arm of the main gear, on which it is mounted.

A duplex throw-off lever 89 is formed with two parallel arms 40 and 4:1, fulcrumed on a rivet 42, fixed in the front plate of the frame of the alarm-movement. The arm 40 is provided with a lug 43, by means of which the duplex lever is operated, and the arm etl terminates in a toe at, which may be projected into the path of the longer arm of the bellcrank lever 11 to raise and hold the latter up when it is desired to throw the alarm mechanism out of operative connection with the time mechanism. It will be noticed then when the lug 43 is pushed upward the toe 44c raises the arm 11 and moves the stud 31 to the right, carrying with it the upper arm of the stoplever and throwing the lower arm 30 thereof into contact with the escape-lever, thus holding it against oscillation and cutting off the alarm.

From the above construction it will be observed that the trip-cam only makes one revolution in twenty-four hours, whereas in the ordinary alarm-clocks the trip-cam is fixed on the hour-shaft and makes two revolutions in twenty-four hours, and should a person wish to retire at six or seven oclock in the evening and rise at seven oelock in the morning and if the alarm was set to sound at seven a. m. it would be tripped at seven p. m. Consequently a person would have to wait until nine or ten ocloek in order to set the alarm. This objection is overcome by my construction, in which the trip-cam only revolves once in twenty-four hours. It will also be observed that the time required to sound the alarm is equivalent to one-half the revolution of the main shaft of the alarm mechanism, and as it requires about a dozen revolutions to wind this shaft up it follows that one winding of the alarm mechanism will answer for about twenty-five alarms, instead of its running down and requiring rewinding every time the alarm goes off.

Although I have specifically described the construction and relative arrangement of the several elements of my invention, I do not desire to be confined to the same, as such changes or modifications may be made as clearly fall within the scope of my invention without departing from the spirit thereof.

Having thus fully described my invention, what I claim as new and useful, and desire to secure by Letters Patent of the United States, is

1. An alarm-clock comprising a time mechanism and an alarm-movement, with intermediate connections, comprising a bell-crank lever, one arm of which is connected to the time mechanism and the opposite arm is provided with a stud, a verge for the alarm-movement, a pivoted lever having an arm operated by the stud, and a depending arm adapted to contact with said verge and throw off the alarm, and a throw-off lever pivoted to the alarm-frame and having a toe projecting into the path of movement of the crank-lever, substantially as described.

2. An alarm-clock having time and alarm movements and operative connections, a bellcrank let-off lever 11, a stud fixed on its shorter arm, a toothed disk loosely mounted on the main shaft of the alarm mechanism, and provided with a pin, projecting into the path of a spring fixed to said disk, a disk 32 connected to the main shaft, and provided with teeth which throw the let-off lever out of operation, an escape-lever and a stop-lever therefor, the latter lying in the path of the let-off lever, substantially s described.

In testimony whereof I hereunto allix my signature in presence of two witnesses.

'WILLlAilI, DUPEN.

'Witnesses:

J. H. NICHOLS, J. L. QUACKENBUSH.

ITO 

